Sequestration of Hydrophobic Organic Contaminants by Geosorbents

Luthy, Richard G.; Aiken, George R.; Brusseau, Mark L.; Cunningham, Scott D.; Gschwend, Philip M.; Pignatello, Joseph J.; Reinhard, Martin; Traina, Samuel J.; Weber, Walter J.; Westall, John C.

doi:10.1021/es970512m

Cited by 941 publications

(760 citation statements)

References 70 publications

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“…Further, they also found that the hematite mineral surface promoted a more open and elongated structure of humic material which was favourable for sorption of hydrophobic organic compounds. Similar observation has been reported by Schwarzenbach et al (1993) and Luthy et al (1997). The observed nonproportional increase in log K exp p values can be attributed to such factors like changes in coiled structure of natural organic matter and increase in the available mineral surface.…”

Section: Estimation Of Experimental Sorption Coefficientssupporting

confidence: 88%

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QSAR Models To Predict Effect of Ionic Strength on Sorption of Chlorinated Benzenes and Phenols at Sediment–Water Interface

Rao

Asolekar

2001

Water Research

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Abstract}It is hypothesised that the experimental sorption coefficient normalised to the organic carbon fraction of sediment (K exp oc ) for non-ionic, hydrophobic, organic pollutant depends upon the molecular properties as well as background ionic strength of the aquatic system. The utility of this concept has been demonstrated by incorporating ionic strength as a parameter in the three quantitative structure activity relationships (QSARs) namely octanol-water partitioning coefficient model (Kow model), the linear solvation energy model (LSE model), and molecular connectivity indices theory (MCI model). Four chlorinated benzenes and two chlorinated phenols were employed in the present study. Sorption experiments using sediment from the Patalganga River were conducted in laboratory (bottle point method) at different ionic strengths (viz. 0.01, 0.05, and 0.10 M). The K cal oc values predicted using Kow model incorporating ionic strength compare reasonably well with the K exp oc values (r 2 ¼ 0:60 and standard error of estimator i.e. SEE=0.35). The LSE model incorporating ionic strength too, was found to be equally good (r 2 ¼ 0:67, SEE=0.33). An attempt has also been made to validate the QSARs developed in the present study utilising the sorption parameters experimentally measured by Dewulf et al. (1996)

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Section: Estimation Of Experimental Sorption Coefficientssupporting

confidence: 88%

“…This too could lead to a decrease in solution concentration of the pollutants. Thus, ionic strength enhances the uptake of pollutants by partitioning it into the natural organic carbon as well as onto mineral surfaces (Luthy et al, 1997).…”

Section: Estimation Of Experimental Sorption Coefficientsmentioning

confidence: 99%

QSAR Models To Predict Effect of Ionic Strength on Sorption of Chlorinated Benzenes and Phenols at Sediment–Water Interface

Rao

Asolekar

2001

Water Research

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“…Lowered hydrocarbon bioavailability is attributed to increased hydrocarbon sequestration onto organic matter and therefore, decreased bioavailability, which is consistent with equilibrium partitioning for neutral organics based on sorption coefficients [29][30][31][32].…”

Section: Discussionsupporting

confidence: 71%

Impact of hydrocarbons from a diesel fuel on the germination and early growth of subantarctic plants

Macoustra

King

Wasley

et al. 2015

Environ. Sci.: Processes Impacts

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. (2015). Impact of hydrocarbons from a diesel fuel on the germination and early growth of subantarctic plants. Environmental Science Processes and Impacts, 17 (7), 1238-1248. Impact of hydrocarbons from a diesel fuel on the germination and early growth of subantarctic plants AbstractSpecial Antarctic Blend (SAB) is a diesel fuel dominated by aliphatic hydrocarbons that is commonly used in Antarctic and subantarctic regions. The past and present use of SAB fuel at Australia's scientific research stations has resulted in multiple spills, contaminating soils in these pristine areas. Despite this, no soil quality guidelines or remediation targets have been developed for the region, primarily due to the lack of established indigenous test species and subsequent biological effects data. In this study, twelve plant species native to subantarctic regions were collected from Macquarie Island and evaluated to determine their suitably for use in laboratory-based toxicity testing, using germination success and seedling growth (shoot and root length) as endpoints. Two soil types (low and high organic carbon (OC)) were investigated to reflect the variable OC content found in soils on Macquarie Island. These soils were spiked with SAB fuel and aged for 14 days to generate a concentration series of SAB-contaminated soils. Exposure doses were quantified as the concentration of total petroleum hydrocarbons (TPH, nC9-nC18) on a soil dry mass basis. Seven species successfully germinated on control soils under laboratory conditions, and four of these species (Colobanthus muscoides Hook.f., Deschampsia chapmanii Petrie, Epilobium pendunculare A.Cunn. and Luzula crinita Hook.f.) showed a dose-dependent inhibition of germination when exposed to SAB-contaminated soils. Contaminated soils with low OC were generally more toxic to plants than high organic carbon soils. Increasing soil-TPH concentrations significantly inhibited shoot and root growth, and root length was identified as the most sensitive endpoint. Although the test species were tolerant to SAB-contaminated soils in germination assays, development of early life stages (up to 28 days) were generally more sensitive indicator of exposure effects, and may be more useful endpoints for future testing. Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsMacoustra, G. K., King, C. K., Wasley, J., Robinson, S. A. & Jolley, D. F. (2015). Impact of hydrocarbons from a diesel fuel on the germination and early growth of subantarctic plants. Environmental Science Processes and Impacts, 17 (7) Keywords: total petroleum hydrocarbons, total organic carbon, monocots, dicots, germination, root and shoot growth. 2 ABSTRACTSpecial Antarctic Blend (SAB) is a diesel fuel dominated by aliphatic hydrocarbons that is commonly used in Antarctic and subantarctic regions. The past and present use of SAB fuel at Australia's scientific research stations has resulted in multiple spills, contaminating soils in these pristine areas. Despite this, no soil quality guidel...

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“…Sorption of hydrophobic organic chemicals (HOCs) by natural organic matter (NOM) in water, soils, and sediments controls their bioavailability, risk, and fate (Chefetz and Xing, 2009;Luthy et al, 1997;Pignatello and Xing, 1996). Some studies have indicated that porosity and surface properties of NOM play a significant role in controlling the sorption (Kleineidam et al, 2002;Pignatello, 2012;Ran et al, 2002Ran et al, , 2004Ran et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

Sorption of phenanthrene and benzene on differently structural kerogen: Important role of micropore-filling

Ran

2014

Environmental Pollution

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Sequestration of Hydrophobic Organic Contaminants by Geosorbents

Cited by 941 publications

References 70 publications

QSAR Models To Predict Effect of Ionic Strength on Sorption of Chlorinated Benzenes and Phenols at Sediment–Water Interface

QSAR Models To Predict Effect of Ionic Strength on Sorption of Chlorinated Benzenes and Phenols at Sediment–Water Interface

Impact of hydrocarbons from a diesel fuel on the germination and early growth of subantarctic plants

Sorption of phenanthrene and benzene on differently structural kerogen: Important role of micropore-filling

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